0x9f-3-usbxhci-image-pci.sys Jun 2026

The stack looks like this:

By methodically working through the power management stack—from the external USB device up through the PCI bus—you can resolve the 0x9F stop code and restore stable, crash-free operation to your Windows system. Remember: In the world of kernel power management, timing is everything. Give your devices the time they need, or remove the request to sleep entirely. 0x9f-3-usbxhci-image-pci.sys

Since usbxhci.sys manages the entire host controller, a single bad device can crash the whole system. The stack looks like this: By methodically working

This is the core "Stop Code." It means a driver did not respond to a power management request (like "wake up" or "go to sleep") within a set time limit. 0x9f-3-usbxhci-image-pci.sys